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Chapter 3
Weight and Balance Worksheet
1. Maximum extended length of the keyboard/work surface product:
D=_________ft
2. Total the weight of all fixed and trained service personnel serviceable slide-mounted products:
a=________lbs; b=_________lbs; c=_________lbs; d=_________ lbs; . . .
3. Calculate the moment for both the (M1) and the fixed and trained service personnel serviceable
slide-mounted products (M2) totals from above:
Model
1.25 m
1.6 m
1.96 m
M1 = Moment of rack with 180 lbs of force applied at D ft.
M2 = Moment of all fixed and trained personnel serviceable slide mounted products.
M2 moment calculations assume a 1.00 ft center of gravity for installed products.
If M1 is less than or equal to M2, no additional counter weight is needed.
If M1 is greater than M2, use the formulas below to determine the required counter weight.
Determine required counter weight if M1 is greater than M2:
Force (in lbs) = M1 - M2 ft-lbs / 2.46 = amount of force required @ 2.46 ft
X = Force lbs / 30 lbs = number of C2790A 30 lbs ballast kits to install, where
"X" is rounded up to the next highest integer, e.g., 1.2 = 2 ballast kits.
CAUTION
The anti-tip mechanism is not a substitute for ballast. Use the anti-tip
mechanism when loading or unloading equipment.
Each ballast kit (C2790A) weighs 30 lbs.
M1
M2
180 lbs * D ft
220.2 ft-lbs + (a + b + c + d + ....) * 1.00 ft
246.0 ft-lbs + (a + b + c + d + ....) * 1.00 ft
271.8 ft-lbs + (a + b + c + d + ....) * 1.00 ft
Installation Guidelines
17
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